Nuclear structure of proton-rich unstable nucleus ^(28)P studied by g-factor measurement  

作　　者：郑永男 周冬梅 K. Matsuta M. Mihara M. Fukuda D. Nishimura J. Komurasaki D. Ishikawa R. Matsumiya T. Nagatomo T. Izumikawa S. Takahashi H. Hirano T. Ohtsubo S. Momota Y. Nojiri A. Kitagawa M. Kanazawa M. Torikoshi S. Sato T. Minamisono J. R. Alonso G. F. Krebs T. J. M. Symons 袁大庆 左翼 范平 T. Suzuki 张锡珍 朱升云 

机构地区：[1]China Institute of Atomic Energy [2]Department of Physics, Osaka University [3]RIKEN, Wako, Saitama 351-0198, Japan [4]RI Center, Niigata University [5]Department of Physics, Niigata University [6]Kochi University of Technology [7]National Institute of Radiological Sciences, Inage-ku, Chiba 263-8555, Japan [8]Fukui University of Technology [9]Lawrence Berkeley Laboratory [10]Department of Physics, Nihon University

出　　处：《Chinese Physics C》2009年第S1期215-217,共3页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10435010, 10505032)

摘　　要：Nuclear structure of proton-rich unstable nucleus 28P has been studied by measuring its g-factor for the first time. The g-factor of 28P (Iπ =3+, T1/2=270.3 ms) was measured by means of β-NMR technique combined with the new polarization technique for charge exchange reaction product in the intermediate energy heavy ion collisions. The obtained g-factor of g=0.1028(27) is very much quenched from the Schmidt value, but is well reproduced by the shell model (+0.102). In connection with the magnetic moment of the mirror partner and the β-ray transition probability, the orbital angular momenta and intrinsic spins of protons and neutrons have been determined as lp =0.43(29), ln =1.85(29), Sp)=0.28(4), and Sn =0.44(4).Nuclear structure of proton-rich unstable nucleus 28P has been studied by measuring its g-factor for the first time. The g-factor of 28P (Iπ =3+, T1/2=270.3 ms) was measured by means of β-NMR technique combined with the new polarization technique for charge exchange reaction product in the intermediate energy heavy ion collisions. The obtained g-factor of g=0.1028(27) is very much quenched from the Schmidt value, but is well reproduced by the shell model (+0.102). In connection with the magnetic moment of the mirror partner and the β-ray transition probability, the orbital angular momenta and intrinsic spins of protons and neutrons have been determined as lp =0.43(29), ln =1.85(29), Sp)=0.28(4), and Sn =0.44(4).

关 键 词：28P β-NMR nuclear magnetic moment exotic nuclei 

分 类 号：O571.2[理学—粒子物理与原子核物理]